LINKS
 
These links below will guide you how to determine the model of your AJS:
Pre-War AJS Model
Pre-War Matchless Model
Post-War Model
Most of parts for restoration are obtained from:
AJS and Matchless Owner Club (AJSMOC) in UK
And here the forum where the AJS experts respond to your query: AJS Forum
A Supplement site of AJSM e-group:
AJS Matchless International website
Armour Motor Ltd. provide special parts such as a Siamese pipe for exhaust or silencer of AJS, BSA, Ariel, etc. They have no web site, so here is the address:
Armour Motor (Bournemouth) Ltd.
784, Wimborne Road, Moordown, Bournemouth BH9 2HS, England
phone: 01202-519409 fax.01202-510671
Magneto (i.e. Lucas) parts from Tjebb Leenes of Netherland: [email protected]